Cement mixer and regulator



p v K. B. DIEHL 2296505 CEMENT MIXER AND REGULATOR Filed Jan. 9, 1941 KENT B.D|EH

INVENT R.

BY f@b&

Patented Sept. 22, 1942 CEMEN'I MIXER AN!) REGULATOR Kent B. Diehl, Houston, Tex., assignor 1:0 Halliburton Oil Well Cemenng Company, Duncan,

Okla.

Application January 9, 1941, Serial N0. 373,715

2 Claims.

The invention re1ates 1:0 a cement mixer anti regulator to be usecl Where a neat cemen1; or s1urry is being mixed. An application of the invenoion would be in the mixing of cement to be introduced into a we11 bore in the various types of cementing operations therein. The invention has a particu- 1ar application in combination wi1sh that structure a.nd processes se1; forth in my prior copend ing application Serial N0. 307,848, filed December 6, 1939, for a means and method of cementfing we11s. The invention of such application is directed oo the transporting and use of cement in W911 cementing operations where 1:he cement is transported in bu1k as distinguished from the present practice of transporting the cement in sacks.

The advanoages of what is now known as bulk cernenting are more fu11y sei: forth in said application and the present invention adapts i1sse1f for use in combination with the bu1k cementing operation in that a mixer and regulator are provided which Will receive the cement from the vehicle in which the cement has been transported in bu1k.

Generally, the present invention is intended to receive the bu1k cement in a hopper and then mix and regulate the cement With water so that a uniform slurry will be produced.

I1; is one of the objects of the invention 1;0 provide a mixer and regulator wherein the volume of cement being fed through the device can be controlled by the fiow of water so that the desired percentage of cement and water Will be insured.

Another object of the invention is to provide a cement mixer and regulator wherein the volume of cement and water can be varied, metered and mixed as circumstances required.

Another object of the invention is 120 provide the cement feeding apparatus and the water which is t be mixed With the cement so that the cement will be fed in proportion with the amount of water and a uniform mix or slurry Will resu1t.

Another object of the invention is to provide a mixer wherein a screw conveyor is driven by a water motor which is actuated by the water 130 be mixed with the cement,

Another object of the invention is 110 provide a cement mixer a.nd regulator with meters for the water and the cement and whereln the water and cement may be regulated in the desired proportions.

Still another object of the invention is to provide a mixer and regu1ator for a bu1k cementing operation ab a We1l bore.

Other and further objects of the invention Will be readily apparent when the following description is considered in connection with the accompanying drawing wherein:

The Single figure illustrates a si le elevation of the mixer and regulator With certain parts in secon to illustrate the arrangement thereof.

The drawing shows a vehicle 2 which may be mounted upon the wheels 3 and includes the frame 4. This frame is arranged receive the screw conveyor housing 6 which carries a hopper 1 thereabove. This housing 6 is mounted on the frame 4 and has the screw conveyor 9 mounted therein for rotation so as 120 convey the dry oement from the hopper 1 1:0 the discharge outlet 10. The conveyor may be arranged as desired so as convey a predetermined volume of dry cement through the housing 6 and into the discharge 19 upon each revolution thereof. This may involve screw members having various pitches for tne vane thereon so as 110 convey the desired amount. The cement may be fed to the hopper either from abu1k source or the cutter tab1e may be mounted. above the hopper if Sack cement is used.

A meter illustrated diagrammatically at 12 can be attached 110 the housing 6 and calibrated so as 130 record the volume of cement passing through the device aus the hopper l is maintained fu1l of cement. This calibration may be in the form of either sacks, barrels or pounds, as desired.

In order to drive the screw 9 a water motor I5 is illustrated diagrammatically as being sonnected to the shaft 16 of the screw by means of a. variable speed clutch 11. 'Ihe clutch may be operated or sei; at the desired speed if a reduction or increase in the speed of shaft 16 relative to the motor 15 is desired.

'Ihe water motor may be operated by a source of Water from the pipe 211 Which may be forced into the motor by a pump 21 through the Connection 22. A Water meter 23 is provided so that the volume of vvater passing through the device can be recorded. A water discharge connection 25 lea.ds from the motor 15 through a va1ve 26 the connection 28 leading into the discharge sonduit 111 of the mixer. This arrangement is provided so that the weier from the motor 15 is introduced into the dry cement, and. it seems obvious tha1s by regulation of the parts, the exact proportions of water and cement can bo introduced and the volume of cement Will be proportional to the water because the water is used to drive the screw 9 for feeding the cement. The connection at 28 may be a jet type connection 130 jet the Water into the cement, or the water may be allowed 120 fiow freely into the discharge connection III.

The valve 26 may be operated to control the flow as desired.

In some instances it may be desirable to by-pass a portion of the water around the motor I5 anal into the discharge conduit II]. T this end a bypass water pipe 30 carrying a valve 3l leads from the connection 22 into the conduit 10 where the water may discharge at 32' into the conduit.

It seems obvious from the foregoing that the mixer and controller can be adjusted and regulated so as to obtai.n any desired mix of cement and water, or, if desired, water only can be forced through the conduit III.

The conduit I0 has a discharge opening ab 35 leading into a sump or box 36 from which it may be picked up by the suction pipe 31 of the pump which is to convey the cement to the point of application. y

Broadly, the invention contemplates a combination mixer and regulator wherein the amount of cement fed into the device is in proporti0n 130 the water which efiects the feeding 01T the cement.

What is claimed is:

1. A cement mixer anti regulator inclucling a. frame, a screw ponveyor thereon, a hopper connected 1:0 said conveyor and adapted to receive dry cement to feed to said screw, a discharge couduit from said conveyor, a wa.ter connection a meter therein to measure the flow of wacer, a water motor operated by the flow of water from said connection, a. driving connection from said motor to said screw including, a variable speed clutch 130 control the rate of movement 015 said screw, a discharge connection from said motor to sa.id discharge condu1't so as to mix the water and cement to a slurry and a gement meter 1:0 record the volume of cement being discharged by said screw.

2. A cement mixer and regulator including a frame a screw conveyor thereon, a. hopper connected With said conveyor and adapted to receive dry cement 130 feed t0 said screw, a discharge conduit from said conveyor, a water connection, a meter therein measure the flow of water, a water motor operated by the flow of water from said connection, a driving connection from saia motor to said screw including, a variable speed clutch to control the rate of movement of said screw, a discharge connection from said motor to said discharge conduit so as to mix the water and cement a s1urry, a cement meter 110 record the volume of cement being discharged by said screw and a water by-pass line from ahead of said motor seid conduit to c0nduit water around said motor.

KENT B. DIEHL; 

